Forming mechanism for composite sealing strips



Oct. 14, 1952 w. s. BAKER 2,613,720

FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Filed Dec. 2, 1950 6 Sheets-Sheet 1 W. S. BAKER FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Filed D80. 2, 1950 Oct. 14, 1952 6 Sheets-Sheet 2 mwww INVENTOR WALTER SCOTT BAKER BY r- )!(e 6&7- ATTORNEY W. S. BAKER FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Filed Dec. 2, 1950 Oct. 14, 1952 5 Sheets-Sheet 5 INVENTOR WALTER SCOTT BAKER Y B gvW +71 47 ATTORNEYS Oct. 14, 1952 w. s. BAKER FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Filed Dec. 2, 1950 6 Sheets-Sheet 4 w. s. BAKER 2,613,720

FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Oct. 14, 1952 6 Sheets-Sheet 5 Filed Dec. 2, 1950 rh z' ATTORNEYS INVENTOR WALTER SCOTT BAKER 952 w. s. BAKER 2,613,720

, FORMING MECHANISM FOR COMPOSITE SEALING STRIPS Filed Dec. 2, 1950' e Sheets-Sheet s INVENTOR WALTER SCOTT BAKER ATTORNEYS Patented Oct. 14, 1952 FORMING MECHANISM FOR COMPOSITE SEALING STRIPS J Walter Scott Baker, Logansport, Ind, assignor to The General Tire and Rubber Companmhk'r'on,

Ohio, a corporation of Ohio Application December 2, 1950, Serial No. 198,769

' 12 Claims.

This invention relates to a mechanism for forming s al ri adapte v o be m nt d in the glass receiving channels of motor vehicle windows. The, sealing strips of such windows are. mounted in the window channels bordering the window. opening and are commonly formed to, extend along three sides of the window opening. For example, the sealing strip may be termed to extend'up one. side of a window opening and along the top and bottom channels to the division bar.

Sealing strips of the type referred to are commonly composite strips having a sheet metal a e iie s whic am ne o e in m rial is applied. These strips are commonly an fac ur d. i th fo m 'Q? a niic q 's straight st p, which; is sitesr b t t t rm to the icd-W QPQ iIl To P i h b p'crtio 0f; h s r o. be t s. n l s. he hea met strip o ne h ba be r d s wi h an xte inwardly from one edge thereof toward the other so that the slotted edge may be lengthened suihciently o permit t e Str to b en in its O Plane about its continuous edge. The edges of the metai base strip are rolled over to retain the facing material and the visible edge of the strip at the margin oi the window opening is commonly provided with a continuous slotted tubular headwhich slidably engages the body of the strip and which may be formed of or plated with. a ebrrq q r ittani m t ifhe machine or the present invention prorides means ior bending a composite strip such as above described in its own plane while holdi h r p a a nst diswri on' ur n h b n ing operation. ifhe str-ipv is so held during the bending operation that pressure on the slotted edge of the strip is avoided, so that the slotted edge of the base strip is permitted to move freely as the strip is bent to lengthen the slotted edge at the corners.

Means is also provided to automatically cut the ends f th Str a t e om e ion o h di qnera qn t s a h en s. a d to simu aneous ap ly r r to the s t edge of the strip 'along' its entire length to set the same in clamping engagement with the fabric facing and to set the strip in'the form to which it has been bent.

The invention has for its object to provide a simple and efficient machine for forming, trimming and setting composite sealing stripsof the character referred to, more particular objects being to provide means for quickly and easily bending the composite strip to conform to a window openingwithout causing distortion at the corners, to perio rm such bending operation without interfering with movements of the slotted edge of the base. strip in the slotted tution, in which:

Figure 1 is a front elevation of the machine embodying the invention;

Fig. 2 is a sideelevation of the machine shown in Fig. 1

Fig. 3 is a fragmentary section taken on the line indicated at ii -:3 in Fig. 2;

Fig. 4 is a fragmentary, side elevation on an enlarged scale showing the clutch operatedtrip mechanismf Fig. 5 is a plan View of the template of the strip clamping, bending and cuteoff devices that are mounted on the press bed, viewed asfindicatedat 5-5 in 1 Fig. 6 is a side eievation of the assembly shown in Fig. 5;

Fig. '7 is a perspective view. of the. composite glass channel sealing strip. which is acted upon by the machine of the present invention;

Fig. 8 is a section taken on the broken line indicated at 8-8 in Fig. 5;

Fig. 9 is a section taken on the line indicated at 9- -9in Fig.5; l

Fig. 10 isa' front elevation of the assembly shown in Fig. 5;

Fig. 11 is a plan view of the bending nd cutoff assembly in its retracted cut-ofi position;

Fig. 12 is a iragmentary front elevation on an enlarged scale showing one of the stripcutoii devices;

40 i 1 is a transfere ecti through t strip supporting and retaining bars takes on the line indicated at we ls i'nrigfs;

Fig. 1a is a transverse section through the strip retaining and supporting bars taiien on the line indicated at I4 l4 in Fig. 5;

Fig. 15 is a fragmentary horizontal section taken on the line indicated at I5 --l5 in Fig. 14 with parts broken away to show underlying portions of the clamped strip;

Fig, 16 is a plan View of the finished sealing strip; and

Fig. 1'7 is a diagrammatic view showing the fluid pressure. and electrical control devices".

The machine of the present invention is designed particularly for bending and trimming to size a composite strip of the type best shown in Fig. '7 of the drawings. The sealing strip A which is acted upon by the machine of the present invention has a sheet metal base b provided with rolled edges and d and having parallel slots e extending from the rolled edges d to adjacent the rolled edges 0. The rolled edges 0 and d serve to retain a pile fabric seal strip 1 and between the fabric strip and the base 11 a core 9 of fibrous material, rubber or the like may be placed. The slots e are provided for the purpose of permitting the strip A to be bent in its own plane, the bending of the strip causing the separated portions of the rolled edge (1 to move apart to lengthen the outer edge of the n strip when the strip is bent to substantially U- shape form to conform to the shape of a window opening. The sealing strip is placed in the window channel with its rolled edge 0 facing the window opening and, in order to stiffen the stri and conceal the rolled edge e, a slotted tubular bead h which may be formed of sheet metal is provided which receives the rolled edge 0.

The machine of the present invention is designed to bend a straight strip A of the proper length in the plane of its base b to substantially U-shape while the strip is held against distortion, and is so designed as to perform this bending operation without interference with the free movement of the separated portions of the edge 11.

The machine of the present invention includes a strip bending and cut-off assembly which comprises a horizontally movable template B, a central clamping member C against which the central portion of the strip is clamped by the template B, strip bending wings D pivoted to the ends of the member C, and strip cut-off assemblies E mounted on the template B at its front end.

The strip bending and cut-off assembly of the present invention is carried by a supporting plate I that is mounted on spacing blocks 2 on the bed 3 of a suitable press 4, and the template B is reciprocated on the bed by means of a cylinder connected to the template by a piston rod 6. The press 4 has an upper movable platen 1 mounted in vertical guides 8 and connected by an adjustable screw connection 9 with an eccen- 'tric block I 0 that is moved up and down by means of a crankshaft II. The crankshaft II is driven by a flywheel pulley I2 which is connected to the shaft II by a suitable trip operated one revolution clutch which when actuated permits the crankshaft to be turned through one revolution to depress the platen 1 and to return thesame to its elevated position. The clutch includes a key I3 that is slidable lengthwise of the shaft II in a suitable keyway I4 disposed inwardly of the pulley I2. A spring I5 presses the key I3 towards the pulley I2, which is provided with one or more notches I6 in the hub thereof in which the key I3 is engageable when it is released and permitted to be moved by the spring I5.

The key I3 has a transverse slot I1 that is engaged by a cam bar I8 which normally holds the key I3 in retracted position free of the pulley I2. The bar I8 is pivotedto a bracket I9 fixed to the press frame to swing vertically into and out of engagement with the underside of the crankshaft I The cam bar I8 has a connecting rod 20 attached thereto and is normally held in engagement with the shaft II by a spring 2| that is mounted in a bracket 22 attached to the press frame and that exerts an upward thrust on the rod 20. The bar I8 has a tapered end 23 which enters the transverse slot I1 of the key I3 to cam the key I3 out of engagement with the pulley I2. The cam bar I8 normally engages in the slot I1 of the key and holds the key out of engagement with the pulley I2. When the trip rod is depressed the bar I8 is pulled out of the notch I1 and the key I3 is pressed into a notch I6 of the pulley by the spring I5, causing the shaft II to rotate with the pulley. After actuation of the trip rod 20 it is immediately released and the spring 2| returns the bar I8 into engagement with the periphery of the shaft II so that when the shaft has completed one revolution the key I3 will have been engaged by the tapered end 23 of the bar I8 and pulled out of engagement with the pulley I2, stopping the shaft II after one complete revolution. The press mechanism above described is of conventional design.

For the purpose of the present invention a special trip mechanism is provided that acts upon an arm 24 that is pivoted at its forward end to the lower end of the rod 20 and at its rear end to a bracket 25 attached to the press frame. The arm 24 is normally held by the spring 2| in a horizontal position and is provided with a longitudinal slot 28 which receives a vertical latch member 21 that is attached to the upper end of an actuating member in the form of a piston rod 28 that extends from a fluid pressure cylinder 29 which is mounted to swing on a horizontal pivot 33. The latch member 21 extends through the slot 28 and has a notch 3| in its front face that provides a shoulder 32 for engagement with the top of the bar so that the bar 24 is pulled downwardly when the piston rod 28 is moved downwardly. The latch member 21 has an inclined front face 33 below the notch 3|] which engages with a roller 34 on the bracket 25 as the latch member is moved downwardly to move the latch member 21 rearwardly and release the bar 24 from the shoulder 32.

The rear side of the latch member 21 is engaged by a pin 35 slidably mounted on the bracket 25 and pressed forwardly toward the latch member 21 by a spring 36. The spring 36 normally holds the latch member 21 in its forward position with the shoulder 32 in engagement with the top of the bar 34. The piston rod 28 of the cylinder 29 is normally held in its elevated position shown in Fig. 2 and, when pressure is admitted to the cylinder 29 to lower the latch member 21, the latch member is moved rearwardly by the roller 34 to free the arm 24 from the latch member, so that the spring 2| will immediately return the cam bar I8 to clutch releasing position. The spring 36 maintains a forward pressure on the latch 21 throughout the range of movement of the latch member, and the front face of the latch member above the notch 3| is inclined for engagement With the forward end 38 of the slot 28, which is also inclined so that upon upward movement of the piston rod 28 the latch member will move upwardly in the slot 26 and rearwardly to compress the spring 36 which snaps the latch member forwardly into the position shown in Fig. 4 when the shoulder 32 is moved to a position above the top of the arm 24 to couple the arm 24 to the piston rod 28 for movement therewith upon the next actuation of the piston.

As shown in Figs. 8 and 9, the template B is carried by a slide in the form of a longitudinal bar 48 that is mounted for endwise movement in a gui'deway 4| on the supporting plate I. A

5.. block- 42. attachedto the. underside; of. the. bar 40 adjacent, its. rear: end. extends; through an elongated slot. 4.3: in. the plate l, the block. 42 being attached to. the. slide; bar 45 by bolts 45. The clamping member C which slides on the plate I rearwardly of the slide bar 45 includes an elongated plate '15: resting upon the top of the plate l and disposed at right angles to the slot 43 and a. guide member 4.5- that has a portion 41 fitting in the slotv 4'3. and. engaging. the bottom of the plate 4.5, the. guide: member 56 being secured to the plate. 45 by bolts 415 that extendthrough the slot A3. Arod 49 isv screwed at its forward end into the block 42 and at its, rear end into. the forward. end of: the. piston rod 6 extendin from the cylinder 5:. The rod 49 provides a rigid extension. of. the. piston rod 5 and also serves to provide a lost motion, connection between the template carrying slide 435, and the clamping member. C. The. rod 45 extends through and slidably fits in a bushing. 51' mounted in the member 46 and a collar 52 on the rod 49 is interposed; between the member 4.6. and the forward'end of the pistonrod 50..

The clamping member C has a transversely i disposed strip supporting plate 53 secured by the bolts 48. to the top of the. transversely disposed platei4l5. and a strip retaining plate 54 which overlies the plate 53.v As shown in Fig. 13, the retaining. plate 5.4 is. slidably mounted on vertical screw posts. 55. attached to the bar 55 and is supported by compressioncoil springs 55 which serve to. hold the; plate 55' in its uppermost position. During the bending operation the strip A is supported on. the. plate 55 as shown in. Fig. 14 with its rear edge. in engagement with a stop strip 51 attached to. the top of the plate 53. A presser plate 5-8. is. slidably supported on vertical screw posts. 59 and; is guided by dowel pins Ed). The plate 58' is norm-ally held in its lowermost positionby compress-ion coil springs 5 l.

The plates 55 and. 58 have beveled flaring forward edges 6'2 and 53 that facilitateentry of the strip A. and template B between the two bars. The springs 51 normally hold the plate 58 slightly below the position which it occupies when the template B is. inserted between the plates 53 and 5.8, so that a downward pressure is maintained upon the. top of. the template B and strip A during the bending operation. A retaining rib 64 is attached to the underside of the retaining plate 53 of the clamping member C and bridges the space. between the rear edge of the presser plate 53. and the stopv strip 5'1. The rib 54 serves to confine the rear'edge of the strip A and hold the same against vertical movement during the bending operation, a chamber being provided for the strip A which confines the rear edge and body of the strip sufficiently to hold the. strip against distortion during bending. The forward edge of the strip A is substantially free from pressure in the portions thereof that are bent about the rear corners of the. template, so that the edge of the sheet metal strip 1 within the bead it can move with. respect to the bead h, during the bending 1- operation. 7

The plate 58 is yieldingly held in engagement with the template B and the rib t4 forms an unyielding confining member for the rear edge of the strip A. The screw posts 55 can be adjusted to raise or lower the rib 65 and the screw posts 59 can be adjusted to vary the range of movement of the presser plate 55. The supporting and retaining plates 53 and 5 5 are disposed centrally of the plate i and the wings D are con-- iii) nected to each end. of the. plate 55, by a pivot. 65 and have substantially the same construction as the: central supporting and. retaining members, each of the wings having a supporting plate 53a, aretaining plateu54a and a presser plate 58a which are substantially identical with the plates 53, 54 and 58. The centrally disposed supporting and retaining plates 53 and 54 and the correspondin pivoted, plates 55a and 54a have interfitting arcuate end: portions 65 and 51 which are formed concentric with the pivots 65 to maintain abutting relation between the, plates 53a and 54a during the pivotal movement of the arms. The central clamping member C and the bending wings have shoulder portions 58 and 69 which limit the rearward movement of the. wings D at a position where they are in alinement with the clamping member. Except for the formation of the parts adjacent the pivots the wings D are constructed in the same way as the central clamping member C and the elements of the wings D which are'identical with corresponding elements of the member C are referred to by the same reference numerals.

The plates 53a of. the, wings D slide on plates 15 attached to the top surface of the plate I and. the plates. 53a have horizontally disposed brackets H attached to their rear edges which slide on the plates "Ill, the brackets 1| having elongated slots 12 which receive vertical rollers l3v mounted on .the plates Til. The clamping member C is urged forwardly by coil springs It attached to the plate I, and to the members 46. The springs 14 normally hold the clamping member C in the position shown in Fig. 5 where it is held by the. rollers 13 against further movement. 1

When the piston rod 5 is moved rearwardly by the cylinder 5 the template B is moved rearwardly into engagement with the strip A to be bent, which is initially placed in the tapered opening formed by the beveled faces 52 and 63 of the plates 53 and 55 of the clamping member C and the plates 55a and 55a of the wings D and pressure of the template B- against the strip A forces the strip A rearwardly between the plates 53 and 58 and into engagement with the stop strip 51, after which the clamping member C is moved rearwardly. The rearward movement of the member C causes the pivoted wings D to be swung forwardly until the position shown in Fig. 11 is reached, bending the strip to conform to the template B and clamping the same against the rear and side edges of the template.

In order to confine the forward edge of the strip A at the corners during the bending operation, the retaining ribs 64 extend around the curved ends of the plate 58 as shown in Fig. 151, and the retaining ribs 64a of the bending wings have inner end portions formed to closely overlie the curved end portions of the ribs 64 of the central clamping member. As the bending arms approach the side edges of the template B the end portions of the strip A are guided into the spaces between the plates 53a and 58a, and are confined throughout the length of the sides of the template between the template and wings. The rolled edge 11 of the strip is confined throughout its entire length beneath the ribs 64 and 54a and isv compressed to set the strip to the form to which it is bent by depression of the retaining plates 54. and5fiia by the platen l which has a yieldably mounted pad la engageable with the plates 54 and 54a.

At its forward edge the template B has laterally spaced brackets I5 attached thereto and in each of the brackets 15 there is mounted a vertically movable cutter blade I6. The blades 16 are disposed one over each side edge of the template at its forward end for engagement with the ends of the strip A which have been bent into engagement with the edges of the template. The blades 16 are normally held in an elevated position by springs TI and these blades are engaged by the pad "lb on the movable platen I of the press, which is actuated upon completion of the bending operation to press the plates 16 and shear off the ends of the strip A.

In order to securely hold the ends of the strip A in proper position during the shearing operation, a pair of latch bars 18 are provided at the forward end of the template. The latch bars I8 are pivoted at their inner ends to brackets 18a attached to the under side of the template B to swing vertically toward and away from the underside of the template at its 'forward edge and these latch bars each carry a recessed shear plate I9 which receives an end of the strip A and positions the same for the cutting operation. The latch bars 18 have tapered ends 89 over which the ends of the strip A can ride as they move into engagement with the edge of the template and into the recess of the shear plate I9. The latch bars I8 are moved upwardly into engagement with the underside of the template as the template approaches its rearmost position by means of tapered cam plates 8| mounted on the plate I. the bending arms move into full engagement with the template the ends of the strip A ride over the inclined end portions 80 of the latch bars and into the recesses of the plate 79 which are provided with shoulders 82 for engagement with the outer edge of the strip A.

The platen I is actuated at the completion of the bending operation and the cutter blades I6 serve to sever the strip adjacent its ends. At the same time the plates 54 and 54a are engaged by the yieldable pad Ia on the platen l to press the ribs 64 and 64a against the outer rolled edge of of the strip A throughout the length of the strip. The bead h and rolled edge are locked against relative sliding movement and the rolled edge (1 is uniformly flattened throughout the length of the strip A to tightly clamp the fabric 1 and to set the strip to the form to which it has been bent.

In the operation of the machine the cylinder is first actuated to move the template B rearwardly and bend the strip A to the desired shape after the strip has been placed in the flaring opening between the plates 53 and 58 of the clamping member C and the plates 53a of the wings D and upon completion of the bending operation the cylinder 29 is automatically operated to trip the crankshaft clutch and cause operation of the cutoff. The cylinder 5 is controlled by a valve 83 of the pressure operated spool type which is connected by lines 84 and 85 to the front and rear ends of the cylinder 5. The valve 83 is connected centrally to a pressure line 86 and it is normally held either by spring pressure or by differential fluid pressure in a position such that the line 84 is connected to atmosphere and the line 85 is connected to the pressure line 86 to hold the template B in its forward position. The valve 83 has pressure chambers 81 and 88 at its opposite ends which are connected by a longitudinal passage 89 with the pressure line 86. The valve has pistons 90 and 9I at the ends thereof which are movable from positions substantially closing the ends of the passageway 89 to a position fully opening the port leading to the passageway, there being sufficient leakage past the pistons to normally maintain pressure in the chambers 8'! and 88. The chamber 81 is connected to a pipe line 92 which extends across the front of the press at a convenient elevation and the pipe line 92 has two normally closed palm valves 93 and 94 in series which are adapted to be operated by the right and left hands of the operator. When the operator presses against both valves 93 and 94 these valves are opened, connecting the chamber 81 to the atmosphere. This exhausts pressure from the chamber 81 and permits the pressure which exists in the chamber 88 to push the valve to the right as shown in Fig. 11 to connect the pressure line 86 to the forward end of the cylinder 6 to retract the template. The rearward movement of the template causes a strip A previously placed between the supporting plate 53 and presser plate 58 to be folded against the template B.

The chamber 88 of the valve 83 is connected by a pipe line 95 to a normally closed valve 96 which is adapted to be opened by a cam 91 on the crankshaft I I to connect the line 95 to atmosphere and reduce the pressure in the chamber 88 to permit the valve 83 to be returned to normal position. The operator holds the valves 93 and 94 open until the platen I has descended to operate the cutoff blades, whereupon these valves are released and permitted to close so that pressure will build up in the line 92 and chamber 81. As the shaft I I nears the completion of its revolution the cam 91 engages the valve 96 and opens the valve so that the pressure in the chamber 87 will shift the valve to its normal position and return the template B to its outermost position.

The pressure line 86 is connected by a branch line 98 to a control valve 99 through which pressure is delivered to the cylinder 29. The valve 99 is normally held by a spring I00 in a position to supply pressure to the lower end of the cylinder 92 to hold the latch member 2'! in its uppermost position. The valve 99 is adapted to be shifted by means of a solenoid IDI to a position connecting the upper end of the cylinder 29 to the pressure line to depress the latch member 21, the solenoid Illl being energized by means of a switch I02 at the rear end of the plate I which is engaged by a trip member I03 on the slide plate 45 when the slide plate reaches its rearmost position. The switch I02 serves to energize the solenoid I OI to instantly trip the crankshaft clutch to cause the crankshaft to make a single revolution and operate the strip cut-off mechanism.

Immediately upon the actuation of the valve 96 by the cam 91, the template B is moved forwardly and the slide plate 45 is moved forwardly by the springs 14, releasing the switch I02 which opens to deenergize the solenoid IllI and permit the spring I00 to shift the valve 99 to a position to elevate the latch member.

After each cycle of operation a formed sealing strip is removed from the template and a straight strip is placed in the space between the bars 53 and 58, after which the palm valves 93 and 94 may be actuated to initiate another cycle of operations.

It is to be understood that in accordance with the provisions of the patent statutes, variations 9 and modifications of thespecific devices herein shown and described may be made without'departing from the spirit of the invention.

What I claim is:

1. A strip forming mechanism comprising bed, a template havingrea'r'and side strip forming edges slidably mounted on said bed'for movement in a direction transverse to itsr'e'ar edge, strip clamping and bending members mounted on the bed for movement-thereon in the direction of movement of the template andeompri'sing 'a central strip clamping member parallel to therear edge of the template andw'in'g'mem-be'rs pivoted to the ends of said clamping member and movable about their pivots to bend end portions of the strip into engagement with th'e si'de edges of said template, means for a'ctuatin'g the"clamping and bending members to bend the stripinto engagement with the'side edges of the templ'ate, cutters carried bythe template adjacent' the forward ends of its side edges, and means controlled by said actuating means for operating saidcutters to trim the ends of the formed strip.

I 2. A stri forming mechanism comprising a bed, a template having rear and side-strip forming edges slidably mounted o'n'said bed'for' movement in a direction transverse to -its rear edge, strip clamping and bending member mounted on the bed for movement thereon in the direction of movement ofthe template and comprising a central strip clamping member parallel to the rear edge of the templateand wing members pivoted to the ends of said clamping member and movable about their pivots to bend end portions of the strip into'engagemen't with theside edges of said template, said clamping'member and said wing members having supporting plates upon which the strip to be formed issupporteddthe top surfaces of said plates being positioned-to engage the under side of said template, means for actuating the clamping and bending 'm'embers'to bend the strip into engagement with the side edges of said template, cutters carriedby the template adjacent the forward ends of its side edges, means controlled by saidactuating-means-for operating said cutters-to trimth'e ends or the strip, and means for pressing the formed strip against said supporting plates substantiallythroughout the length thereof during the cuttingoperation.

3. A strip forming mechanism comprisinga bed, a template slidably supported on said bed, said template having rear and sidestrip formingedges, its rear edge being transverse toits direction of movement, a strip clamping member mountedon the bed to the rear of said template, said memher being parallel to the reared'ge of s'aid'te'mplate and movable in the direction of movement of the template, strip'bending wing pivoted to the ends of said clamping memberand movable from positions in substantial alinement with the clamping member to positions-substantially parallel to the side edges of the template, means connecting said wings to said had to swing-the same about their pivots upon rearward movement of said clamping member, c'utters'carried by said template at its forward end and projectingpast said side edges, means for moving the template rearwardly to clamp a strip between the template and clamping member and to mo've the-clamping member rearwardly to bend the strip'against the side edges of the template, and means controlled by said actuating means'fo'r actuating said cutters upon completion of the rearward movement of the template to trim the'en'ds of the formed strip.

4. A strip forming mechani'sm comprising a 10 bed, a template slidably supported on said bed, said template having rear and side strip forming edges, its rear edgebeing transverse to its direction of movement, a strip clamping member mounted on the bed to the rear of said template, said member being parallel to the rearedge of said template and movable in the. directionoi movement of the template, strip bending wings pivoted to the ends of said clamping member and movable frompositions in substantial alinement with the clamping member to positions substantiallyparallel to the side edges of the template, means connecting said wings to said bed to swin the. same'about their pivots upon rearward movement of said clamping member, cutters carried by said template at its forward end adjacent its .opposite side edges, each cutter comprising a lower vertically movable shear member having'a recess shapedto conform to the strip being formed and an upper vertically movable shear member, means for moving said template and'clamping member rearwardly to cause the strip to bend to conform to the rear and side edges of the template, means operable during the movementor the template to move said lower shear members upwardly to position their strip receiving recesses alongside the side edges of the template, and means controlled by the template actuating means for moving the upper shear members downwardly to trim the ends of the-formed strip.

5. A strip forming mechanism comprising a bed, a template slidably supported on said bed,

said template having rear and side strip forming edges, its rear edge being transverse to its direction of movement, a strip clamping member mounted on the bed to the rear of said template for movement thereon in the direction of movement or the template, said clamping member having a supporting plate positioned forengagement with the bottom face of the template and provided with a stop extending parallel to the rear edge of the template and'a spring supported retaining plate above the. supporting plate provided with a downwardly projectingrib forward- 15] of said stop, strip bending wings pivoted to opposite ends of said clamping member, said wings being movable forwardly from positions in alinement with said clamping member to positions in engagement with the template and having supporting and retaining plates substantially corresponding to those of the clamping member,

means connecting said wings to said bed to swing the same forwardly upon rearward movement of the clamping member, actuating means for moving the template rearwardly into engagement with the clamping member and for moving the template and clamping member simultaneously, and means controlled by the template actuating means for applying pressure to said retaining plates and through said ribs to the bent strip to set the same to the form to which it has'been bent. v

6. A strip forming mechanism comprising .a bed, a template slidably supported on said bed, said template having rear and side strip forming edges, its rear edge being transverse to its direction of movement, a strip clamping :member mounted on the bed to the rear of saidte'mplate for movement thereon in the direction of movement of the template, said clamping member having a supporting plate positioned for engagement with the bottom face of the'template'and provided with a stop extending parallel to-the rear edge of the template and a spring supported retaining plate above the supporting plate iprovided with a downwardly projecting rib forwardly of said stop, said rib having forwardly extending arcuate end portions, strip bending wings connected to opposite ends of said clamping member by pivots substantially concentric with said arouate end portions of said ribs, said wings having strip supporting and retaining plates corresponding to those of the clamping member, the ribs of the retaining plates of said wings having inner ends closely adjacent said arcuate end portions, said wings being movable forwardly from positions in alinement with said clamping member to positions in engagement with the template and having supporting and retaining plates substantially corresponding to those of the clamping member, means connecting said wings to said bed to swing the same forwardly upon rearward movement of the clamping member, actuating means for moving the template rearwardly into engagement with the clamping member and for moving the template and clamping member simultaneously, and means controlled by the template actuating means for applying pressure to said retaining plates and through said ribs to the bent strip to set the same to the form to which it has been bent.

7. A strip forming mechanism comprising a press having a bed and a platen above the bed movable toward and away from the bed, mechanism for imparting a reciprocating stroke to said platen and for stopping the same in elevated position, a template on said bed having rear and side strip forming edges, strip clamping and bending means comprising a clamping member parallel to the rear edge of said template and bending wings pivoted to the ends of said clamping member and movable to positions along the side edges of the template, means for actuating said members to bend a strip into conformity with the rear and side edges of said template, a trip controlled by said actuating means for initiating operation of said platen actuating mechanism, and cutters carried by said template and actuated by said platen for trimming the ends of the formed strip.

8. A strip forming mechanism comprising a press having a bed and a platen above the bed movable toward and away from the bed, mechanism for imparting a reciprocating stroke to said platen and for stopping the same in elevated position, a template on said bed having rear and side strip forming edges, strip clamping and bending means comprising a clamping member parallel to the rear edge of said template and bending wings pivoted to the ends of said clamping member and movable to positions along the side edges of the template, means for actuating said members to bend a strip into conformity with the rear and side edges of said template, a trip controlled by said actuating means for initiating operation of said platen actuating mechanism, and means operated by said platen for applying pressure to the formed strip throughout its length to set the same to the form to which it is bent.

9. A strip forming mechanism comprising a press having a bed and a platen above the bed movable toward and away from the bed, mechanism for imparting a reciprocating stroke to said platen and for stopping the same in elevated position, a template on said bed having rear and side strip forming edges, strip clamping and bending means comprising a clamping member parallel to the rearedge of said template and bending wings pivoted to the ends of said clamping member and movable to positions along the side edges of the template, means for actuating said members to bend a strip into conformity with the rear and side edges of said template, a trip controlled by said actuating means for initiating operation of said platen actuating mechanism, means operated by said platen for applying pressure to the formed strip throughout its length to set the same to the form to which it is bent, and means operated by said platen fortrimming the ends of'said strip.

10. A machine for forming composite strips comprising a support, a strip clamping member mounted on said support for movement in a direction transverse to its length, said member having a strip supporting plate and a strip retaining plate for the supporting plate having a fiat top face to receive the strip to be formed and a stop extending longitudinally against which an edge of the strip may be positioned and the retaining plate having a rigid rib forwardly of said stop and an upwardly yieldable presser plate forwardly of said rib, strip bending wings pivoted to said clamping member and forming continuations thereof, said wings having supporting plates, retaining plates, stops, ribs and presser plates alined with the corresponding parts of the clamping member, a template having a rear edge parallel to said clamping member and adapted to enter into the space between said presser plate and said supporting plate to press the strip to be formed against the stop member, said template having side edges adapted to be received between the supporting and presser plates of said wings, and actuating means for moving said template and said clamping member and wings relatively to clamp the strip against the rear and side edges of the template while the said strip is confined between the supporting plate and said rib and said presser plate.

11. A machine for forming composite strips comprising a support, a strip clamping member mounted on said support for movement in a direction transverse to its length, said member having a strip supporting plate and a strip retaining plate for the supporting plate having a flat top face to receive the strip to be formed and a stop extending longitudinally against which an edge of the strip may be positioned and the retaining plate having a rigid rib forwardly of said stop and an upwardly yieldable presser plate forwardly of said rib, strip bending wings pivoted to said clamping member and forming continuations thereof, said wings having supporting plates, retaining plates, stops, ribs and presser plates alinedwith the corresponding parts of the clamping member, a template having a rear edge parallel to said clamping member and adapted to enter into the space between said presser plate and said supporting plate to press the strip to be formed against the stop member, said template having side edges adapted tobe received between the supporting and presser plates of said wings, actuating means for moving said template and said clamping member and wings relatively to clamp the strip against the rear and side edges of the template while the said strip is confined between the supporting plate and said rib and said presser plate, and means controlled by said actuating means for applying pressure to said retaining plates and through said plates to'said ribs to set the strip to the form to which'it has been bent.

12. A machine for forming composite strips comprising a support, a strip clamping member mounted on said support for movement in a direction transverse to its length, said member having a strip supporting plate and a strip retaining plate for the supporting plate having a flat top face to receive the strip to be formed and a stop extending longitudinally against which an edge of the strip may be positioned and the retaining plate having a rigid rib forwardly of said stop and an upwardly yieldable presser plate forwardly of said rib, strip bending wings pivoted to said clamping member and forming continuations thereof, said wings having supporting plates, retaining plates, stops, ribs and presser plates alined with the corresponding parts of the clamping member, a template having a rear edge parallel to said clamping member and adapted to enter into the space between said presser plate and said supporting plate to press the strip to be formed against the stop member, said template having side edges adapted to be received between the supporting and presser plates of said wings, actuating means for moving said template and said clamping member and wings relatively to clamp the 2 strip against the rear and side edges of the template while the said strip is confined between the supporting plate and said rib and 14 said presser plate, and means controlled by said actuating means for trimming the ends of the formed strip while the strip is being subjected to pressure between said rib and said supporting plate.

W. SCOTT BAKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 107,901 Hall Oct. 4, 1870 361,340 Wilder Apr. 19, 1887 629,412 Wuelfing July 25, 1899 811,975 Vollmer Feb. 6, 1906 972,195 Jacobs Oct. 11, 1910 1,432,573 Senft Oct. 17, 1922 1,710,261 Kellogg Apr. 23, 1929 1,785,116 Fassinger Dec. 16, 1930 2,476,595 Green July 19, 1949 2,552,617 Bath May 15, 1951 I FOREIGN PATENTS Number Country Date 22,312 Denmark July 30, 1917 105,097 Great Britain Mar. 28, 1917 

